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Date- March 8,2005 <br /> 6 ^ Quarter 1S'Quarter,2005 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 760 <br /> Address 225 South Cherokee Lane, Lodi, CA <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person URS/Vernon Elarth <br /> Consultant Project No 38466403 0A143 <br /> Primary Agency/Regulatory 1D No San Joaquin County Environmental Health Department <br /> (SJCEHD) <br /> Assembly Bill 681 Status Property Owned by Gur reet Dhatt and Kuldeep Dhatt <br /> WORK PERFORMED THIS QUARTER (First 2005): <br /> 1 Performed quarterly groundwater monitoring and sampling <br /> 2 Prepared and submitted quarterly groundwater monitoring report <br /> 3 Completed site Assessment/Closure Request Report and submitted to SJCEHD for review and comment <br /> WORK PROPOSED FOR NEXT QUARTER (Second 2005): <br /> 1 Perform quarterly groundwater monitoring and sampling <br /> 2 Prepare and submit quarterly groundwater monitoring report <br /> QUARTERLY RESULTS SUMMARY (First 2005): <br /> Current Phase of Project Monitoring/Assessment <br /> Frequency of Groundwater Sampling MW-1 through MW-5 sampled quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Is Free Product (FP) Present Onsite No <br /> FP Recovered this Quarter None <br /> Cumulative FP Recovered to Date None <br /> Current Remediation Techniques None <br /> Approximate Depth to Groundwater 59 00 to 61 00 feet below ground surface (bgs) <br /> Groundwater Flow and Gradient Southwest @ 0 02 feet/foot (ft/ft) <br /> ANALYTICAL DATA REVIEW: <br /> Based on the review of the analytical and hardcopy data (chain-of-custody records, blanks, dilutions, holding times, <br /> LCS/LCSD results,MS/MSD results, and surrogate recoveries), the data are acceptable as reported by the laboratory <br /> with the following limitation <br /> • The reported results for the Method 8260B analytes in sample MW-5 may be biased low since the analyses for <br /> these analytes were performed beyond the U S EPA recommended holding time (Refers to the December 13, <br /> 2004,sampling event} <br /> K MPTxess\15 BP ARC0\00760\Q-Wev1y120Q5\1 QTR 051766GWMR IQ05 doe Page 1 <br />